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Service Life Prediction of R.C. Structures Considering Chloride Binding  

Lee, Chang-Soo (서울시립대학교 공과대학 토목공학과)
Park, Jong-Hyok (서울시립대학교 대학원 토목공학과)
Kim, Young-Ook (서울시립대학교 대학원 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.10, no.1, 2010 , pp. 15-22 More about this Journal
Abstract
Chloride-induced corrosion of steel bars in concrete exposed to marine environments has become one of the major causes of deterioration in many important facilities made of reinforced concrete. A study on chloride penetration in concrete has developed through long period exposure test along seawater, assesment of chloride ion diffusion by electrochemical techniques and so on. However, reasonable and exclusive chloride penetration model considering concrete material properties with mixture, degree of hydration, binding capacity has not been established. Therefore, in this paper, chloride penetration analysis of non-steady state is accomplished with material properties of concrete. Comparing with the results of analysis and chloride ponding test, we could accept the effect of binding capacity on chloride penetration in concrete and these results could be applied to a service life prediction of R.C. structures submerged in seawater. Therefore, there are 20~40% differences of service life to SHRP prediction.
Keywords
Chloride penetration; Binding model; Non-steady state analysis; Chloride ponding test; Service life prediction;
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